last night, comedian jon stewart took his turn. >> i would say even you would admit, it was not the optimal response, at least to the american people, as far as all of us being on the same page. >> well, here's what i'll say. >> yeah. >> if four americans get killed, it's not optimal. >> right. >> and we're going to fix it. and -- >> all of it. >> all of it. >> reporter: that remains a work in progress. the president has vowed to bring those responsible to justice, but although government officials suggest that members of the extremist group ansar al sharia were involved in the attack, a "new york times" reporter spent two hours on the patio of a crowded luxury hotel last night with a leader of that group, as he sipped a strawberry frappe. this afternoon, republicans in congress released new images from the compound where ambassador chris stevens and three had americans died, including earlier photos from previous attacks in benghazi, highlighting how precarious the security situation had been. they also released this chilling june cable from ambassador stevens, warning islamic extremism wa